class Student:
    def a(self):
        self.name = '蓝猫'

    def i(self):
        print('%s吃鱼' % self.name)

    def j(self):
        print('%s吃水' % self.name)

b = Student()
b.a()
b.i()
b.j()
b.name = '淘气'
b.i()
b.j()



